<!DOCTYPE html>
<html lang="zh-CN">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>File History Manager</title>
  <style>
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      display: flex;
      align-items: center;
      justify-content: center;
      height: 100vh;
      color: white;
      overflow: hidden;
    }

    .splash-container {
      text-align: center;
      animation: fadeIn 0.8s ease-out;
    }

    .logo {
      width: 80px;
      height: 80px;
      margin: 0 auto 20px;
      background: rgba(255, 255, 255, 0.2);
      border-radius: 20px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 32px;
      animation: pulse 2s infinite;
    }

    .app-name {
      font-size: 24px;
      font-weight: 600;
      margin-bottom: 8px;
      letter-spacing: 0.5px;
    }

    .app-description {
      font-size: 14px;
      opacity: 0.9;
      margin-bottom: 30px;
    }

    .loading {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }

    .loading-text {
      font-size: 14px;
      opacity: 0.8;
    }

    .spinner {
      width: 20px;
      height: 20px;
      border: 2px solid rgba(255, 255, 255, 0.3);
      border-top: 2px solid white;
      border-radius: 50%;
      animation: spin 1s linear infinite;
    }

    @keyframes fadeIn {
      from {
        opacity: 0;
        transform: translateY(20px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    @keyframes pulse {
      0%, 100% {
        transform: scale(1);
      }
      50% {
        transform: scale(1.05);
      }
    }

    @keyframes spin {
      0% { transform: rotate(0deg); }
      100% { transform: rotate(360deg); }
    }

    .version {
      position: absolute;
      bottom: 20px;
      left: 50%;
      transform: translateX(-50%);
      font-size: 12px;
      opacity: 0.7;
    }
  </style>
</head>
<body>
  <div class="splash-container">
    <div class="logo">📁</div>
    <div class="app-name">File History Manager</div>
    <div class="app-description">文件历史版本管理工具</div>
    <div class="loading">
      <div class="spinner"></div>
      <div class="loading-text">正在启动...</div>
    </div>
  </div>
  <div class="version">v1.0.0</div>
</body>
</html>